Improvement in loom-shuttles



E. A. TH-ISSELL.

Improvement in Loom-Shuttles.

No. 129,692, Patente dj uly23, 1872.

formed in the body of the shuttle. shield, placed between the spring andheel of PATENT OFFICE.

EARL AMRI THISSELL, or LOWELL, MASSACHUSETTS.

IMPROVEMENT IN LOONi-SHUTTLES.

Specification forming part of Letters Patent No. 129,692, datedJuly 23,1 872.

Specification describing certain Improvements in Loom-Shuttles, inventedby EARL AMRI THIssELL, of Lowell, in the county of Middlesex and Stateof Massachusetts.

My invention relates to an improvement in the mechanism for holding thespindle of the shuttle in its extreme positions, while permitting it tobe freely moved from one extreme position to the other when desired; andconsists in the combination, with the shuttle-body and the spindle, andthe spring which presses against the heel of the spindle, of a socketformed in the body of the shuttle to contain the spring, and a shield ofthin metal placed over one end of the spring upon which the heel of theshuttle presses; the object of my invention being to produce a shuttlein which the spring has a 'freer movement than has heretofore beenattained, and also to cheapen the manufacture of shuttles.

A represents a section of aportion of a shuttle-body; B, a portion ofthe spindle; (J, the

pivot; D, the spring, placed in the socket E F is a the spindle. Theshield is simply a'small piece of steel plate with a portion bent atright angles, or nearly so, the object of this bent portion being toprevent the shield from slipping from its positionin one direction, thestock of the shuttle confining it in other directions. This shield is ofa forirrwhich is most cheaply made, and, having no spindle within thespring, all friction of the spring and tendency to cramp against thespindle is obviated and the spring is free to bend laterally as the heelof the spindle is pressed from one extreme position to the other. Whenthe spindle is closed, or when it is open, as in the drawing, the heelrests to one side of the axis of the spring, and the spring iscompressed more on that side. In moving the spindle from that positionthe spring must be compressed, not only by the amount due to the curvedpath and the peculiar form of the heel, asin other shuttles withspindles actuated by spiral springs, but also by the amount the springunder the heel is compressed more than the middle portion, or theportion near the axis. This arrangement produces in a high degree thepeculiar action desired in a shuttle-sprin g, the resistance to movementin the spindle bein g'mainly in the first portion of the path movedover.

The shuttle here shown is arranged with a well-known device for holdinga bobbin in position on the spindle, which device is omitted when theinvention is applied to a cop-shuttle.

The spindle is held in position against the resistance of the spring ineach of its extreme positions by abutting against the shuttle-body atpoints H H in the drawing.

I do not claim the spiral spring acting on the heel of the spindle.

I claim- The combination of the shield F, substantially as described,with the spring D, the socket E, the spindle B, the pivot G, and theshuttle A.

EARL AMRI THISSELL.

Witnesses:

NATHANIEL HILL, S. W. HUsE.

